Grinding-machine.



PATENTED MAR. 19, 1907. A. s. BUSSELLE & J. w. PEDIGO.

GRINDING MACHINE. APPLICATION rum) 00 T.30.1906

"Hanna's-sum 1'.

No 847,463. PAT 316m) MAR. 19, 1907. A. s. BUSSBLLE & J. w. PEDIGO. GRINDING MACHINE z BETH-SHEET a.

APPLICATION I'ILED 0OT.30.1906.

'llllllillllllllllllliii m X UNITED. sTArEs PATENQ OFFICE- ARTHUR s. BUSSELLE AND JESSE wfi tmee, or CHARITON,IIOW A.

GRINDING-MACHINE.

Specification of Letters Patent.

Application filed October 30. 1906. Serial No. 341,270.

ing-Machincs; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in. the art to which it appertains to make and use the same.

()ur invention relates to certain new and useful improvements in grinding-machines especially adaptml to sharpening the blades of lawn-mowers, and has for its object to provide a device which, while simple andeconomic of construction, shall be' capable of ready :nljustment to lawn-mowers of varying dimensions, uniform in its operation upon each and all of the cutting-blades of a mower, and not requiring skilled labor in its use.

With these ends in view our invention consists .in the construction and arrangement of parts, as will be hereinafter and in detail explained.

In order that those skilled in the art to which our invention appertains may know how to make and use our improved device, we will proceed to describe the construction and operation of the same and the manner in which it is used, referring by numerals to the accompanying drawings, in which Figure 1 1s acentral section of a lawn-' mower with our improved grinding-machine adjusted thereon and showing the relation, of the grinding-wheel to one of the-blades of the mower. Fig. 2 is a longitudinal elevation, on enlarged scale, of the grinding device and looking from front or working face of the machine. Fig. 3 is a perspective view of the ad,- justable means for' securing the frame of the device in proper relation with a lawn-mower, only a portion of said frame being shown; and Fig. 4- is an enlarged perspective view of the grinding-wheel frame with adjustable guide for maintaining said wheel in proper relation to the blade of a lawn-mower, and. means for u e l y producing the necessary longitudinal feed of the grinding-wheel.

Similar reference numerals indicate like parts in the several figures of the drawing.

In using our improved machine the lawnmower '1' is placed'in the] position shown in.

Fig. 1, with the usual rear wooden roller 2 upward and the handle3 resting upon the ground or other support, so that the 'bladecylinder 4 may be free to rotate during the feed of the grinding-wheel upon a blade to be sharpened.

5 represents the cutting blades of the mower, which are usually arranged in slightly Patented March 19, 1907.

helical form and secured at each end to 011'- cular cylinder-heads 6.

Having explained briefly the construction and position of the lawn-mower, we will now describe the construction of the grindingmachine, the manner of securingit in position, and its operation.

The frame consists of a longitudinal bar 7, returned at right angles at each end, as shown at 8, the extremity of each of said ends being joined and rigidly held in position by a longitudinal shaft 9, preferably rectangular in cross-section and rotatively mounted in said ends. One of the end portions 8 is extended to constitute a support for ahandle 10, which is secured in place by screws 11, although, if thought desirable, the extended portion of the end 8 may itself be fashioned to constitute an integral handle. Intermediate the bar 7 and the shaft 9 and secured to the ends 8 is arranged a shaft 12, which is formed with a feed-thread and journaled at each end in the end portions 8" of the frame and extending beyond one of said ends a sufficient distance to receive a gear-wheel 13, which is keyed thereto and provided with a suitable o crating-handle 14. The end of the rotatab e shaft 9 below the gear-wheel 13 extends beyond theend 8 and has secured thereto a pinion 15, which meshes with the gear-wheel 13,so that it will. be seen that when the gear-wheel 13 i5 rotated by the'handle 14 the shafts 9 and 12 will be correspondingly rotated. 1 16 is the grinding-wheel frame which is bifurcated at its lower end and within-Which the grinding-wheel 1?. With a cylindrical hu'b 17" is rotativeljnrount'ed; The; hub ,is cored. out tosfit and slidelongitudinally upon the shaft 9 and above the griiiding wheel, and

to its frame 16 is rigidly secured in'any suite" feed-shaft 12, as clearlyshown in Fig 2. Above the threadedbox 18"isrotritively mounted in the frame '16,"a roi1 19 screw threaded at one end to receive a mallednut 20 and bent at right angle at its oppbsite end,"

as shown at 21, and preferably formed on its inner side to enter and traverse within. the

thread of the feed-shaft 12. A coiled spring 22, surrounding the rear end of the rod 19 is located between the back of the frame-16 and the milled nut and serves to hold the transverse-slot 26 -A'headed screw .27 passes 3 through the slot 26 in the frame 16 ulltl through the vertical slot of the flat arm 23, and a similar screw 28-passes through the u pper part of said frame and through the upper vertical slot 24 of the arm 23 and on \be threaded end of both of these screws nlf winged nuts 2!).

, will be seen that the arm 23 out be adjusted vertically and can. then be vibrated upon the screw .28 and thus ad usted transversely so ,as to properly bring the bifurcied lower end 24 'of said arm in proper relation with the -bladeof thelnvn-mowcr, as shown in Fig. I.

From the construction heretofore de- From this construction it scribed it will be seen that the bar 7, with its returned ends 8, the shaft 9, and the ieedshaft 12 cons titt'ite a rigid rectangular ii amc, and in order that said frame with its attached devices may be ad 't'sted vertically as a 'whole the bar 7 is formed with a central transverse part 29 slotted as shown at 30, (see Fig. 2) and is adjustably secured to an nuxiliary frame or bar 31 by means of a screwbolt 32 and winged nut 33, and this auxiliary frame constitutes the means for attaching the main frame and its devices to the lawnmower by means of the books 34, adapted to embrace the roller 2 and secured in. place by set-screws 35. In order that this auxiliary frame may be thus secured to rollers 2 of varying length, the hooks 34 may be longitudinally adjustable upon said frame and secureddn any desired position by set-screws 36. The shafts 9 and '1 2 aremade removable from theif'rame by the employment of collars 37' and sct-screws 38, which when released permit said shafts to be withdrawn through the end portion 8, and the withdrawal of the shaft 9 will also permit the grinding-wheel frame 16'and its devices to be removed for repair or substitution of parts when necessary.

Having described the general construction of our improved device and not wishing to be limited in he details of construction which may be va'ied in many particulars without departing from the spirit of our invention, we will now describe the operation'of the same. When it is desired to shar )en the cutting-blades of a lawn-mower,t e latter is placed in the position shown in Fig. 1, with the wooden roller 2 upward, and so that the blade-cylinder or heads 4 is free to rotate. The auxiliary frame is then secured to tilt roller 2 by means of the hooks 3t and setscrews 35, and the main frame is then vertically adjusted by means of the screw 32 and wing-nut 33. The grinding-wheel lrame lb is then brought into leeding rclation with the feed-shaft 12 through the medium oflhe box 18 and rod 1%). The arm '33 of the grindingwhecl frame is then adj-:slcd so that the bifurcated extremity '24-" will embrace the cutting edge of the bladc 5, and being held in such relation b menus oi the handle H) the gmr-wliecl l2; islotated, and ass result thereof the shafts t) and 1'. are rotated, and the gri'nding-wlu'el is neem'dingl rotated and in cmiseqmvnce ol the slidnblc hub 17 and the feed induced by the threaded shaftl'. the grinding-\\'heel is caused to travel. longil adinalinduring its rotation. The bifurcated extremity of the flat arm 33 embracing the cutting edge 01 the blade also travels longitud.inall v,:u d as the l)lad-e-cylinder is free to rotate it is obvio; sl v contina ()5Sl \'rP'i'(S(lli((l to the grinding action oithe wheel 17. The pitch of the l'ccdidg-tln'ead of the. shaft 12 and the relation of the gear-wheel 13:1nd pinion. 14 are such that the rinding action ofthe wheel 17 may be ellectivc and uniform thrmighout the entire length of the cuttingbladc. \Vhen one blade has been thus sharpened, the rod 1!) of the grimling-wheel fral'nc is moved so as to release the end ll from the tl u'end of the shaft 12 and is then turned up into the position. shown in Fig. 4. and the frame is then free to be moved back a! won the rod 9 to the starting posit ion. The biade-cylindcr is then rotated, and the next blade to be sharpened is brought into proper relation with the bifurcated. extremity 24 of the arm 23, and the operation is repeated.

It will be understood that when our improved grinding-machines are constructed with reference to their use upon machines of unvarying dimensions and relation of parts, the auxiliary frame 31 may be omitted and the hooks 3 in such case will be secured directly to the bar 7 of the frame. It will also be readily understood that when our improved grinding-rmtchine is employed to sharpen the blades of lawn-mowersin which the statiomuy blade is flat thatthe cutting er e of such stationary blade may also be successfully ground without making any change in the grinding machine.

Having described the construction and operation of our improved g'rinding--machine, what we claim as new, and desire to secure by Letters Patent, is

1. In combination. with a frame provided with means for pendent attachment to the, wooden roller of a lawn-mower; a grindingwheel mounted upon a rotatable shaft and longitudinally movable thereon; arotatable llO IIS

' feed-shaft mounted in the frame above the senses 8 grinding-wheel; means intermediate the grinding-wheel and the fecd-shaft for moving the grinding-wheel longitudinally upon its shaft; means for rotating the grindingl wheel shaft and the feed-shaft; and means L connected with the grinding-wheel frame for emla'acing'thc edge of the lawn-mower blade and conveying the same into proper relation with. the grinding-Wheel, substantially as hcreinbeforc setforth.

2. ln agrindingr-machine such as described, and comprising a frame adapted to pendent attachment with the wooden roller of a lawnmower a rotatable feed-shaft and a rotatable grimling-whcel shaft mounted in said frame; a grindingavheel mounted in a frame mounted'upon the grimling-wheel shaft and longitudinally movable thereon; and adapted for connection with the feeding-shaft, and ,adjustablc means for connecting the grinding-- wheel frame with the cutting-blades of a lawn-nwwcr, substantially as hereinbeforc set forth.

3. in. a grinding-machine such as described, in combination with a frame carrying the grinding and f t-din; devices, an auxiliary frame adjustably cmnieetcd with the grinding-mecbanism harm, and adapted to be secured to the wooden roller of a lawnn'1 .)wer in the manner hereinbefore set forth.

4. in a grind in g-m achine such as described, in combination with a frame carrying the grinding and feeding devices, an auxiliary frame adjust ably connected with the grindingancchanisn'i frame and provided with adjustablc means for attachment with the 1 vertical and vibrativeadjustment, substantially as and for the purpose set forth.

6. In a machine such as described in combination with the grinding-wheel frame, a vertically and vibratively adjustable arm secured. to the grinding-wheel frame and, terminating in a bifurcated lower extremity adapted. to embrace the cutting edge of a lawn-nnnver blade, substantially as and for the purpose set forth.

7. In a machine such as described providcd with means for vibrative connection with the wooden roller of a lawn-mower and;

embodying a grinding-wheel, and means for rotating and longitudinally feeding saidwheel mounted in a frame, a'handle suitably located upon said frame, for holding the grimling-wheel and its frame in operative relation to the cutting-blade of a lawn-mower, substantially as hereinbefore set forth.

In testimony whereof We have signed our names to this specification in the presence of two subscribing witnesses.

ARTHUR S. BUSSELLE. JESSE W. PEDIGO. Witnesses:

FRED DUNSIIEE, H. B. BLANCHARD. 

